I have made a fresh install of Centos 7 with owncloud 7, apache 2.4, php 5.4, mysql 5.5.37-MariaDB.During the installation I have installed all the prerequisites owncloud prescribes.I have made the following install trail after installing the basic security:

After this I run the owncloud 'install' (adding the database and admin user). This works fine.The whole system seems to be up and running.However, the last step, when I attempt to run the file conversion, I get this:

I have seen this with some other people, but no clear sollution.Some people say I need to provide a read/writable .config dir in the home folder.So I went to create a .config folder for apache: mkdir /usr/share/httpd/.configI also set the permissions chown -R apache:apache /usr/share/httpd/.configbut this does not seem to have a positive result.

Thanks for your reply. After initially installing Owncloud 7.0.1 I go to the "admin" page and in the "documents" section try the apply and test:

DocumentsMS Word support (requires openOffice/libreOffice) LocalopenOffice/libreOffice is installed on this server. Path to binary is provided via preview_libreoffice_path in config.php ExternalopenOffice/libreOffice is installed on external server running a format filter server

Hm your problem seems to be that the libreoffice somehow wants to start a GUI where it shouldn't.The linked bug report doesn't show this error message and therefore seems to be caused by different things.The linked forum thread shows the same message, but there apparently was no follow-up issue on the issue tracker as advised there by Rancor, so I'd recommend to go ahead and create a new issue here: https://github.com/owncloud/documentation/issues

I was not saying to the world in general "nobody has this issue" but I was rather replying to you. As you, I have searched the forum and internet for a solution to this issue. It appears nobody seems to be having any problems with it. Am I the first to try to install this on a centos 7 install, or am I the only one that is too inexperienced to solve this issue (perhaps the latter).

I don't mind these kind of issues. It causes me to think and learn new things

By the way, installing xhost does not work, setting DISPLAY enviroment to localhost does not help. Setting the DISPLAY environment to another server that runs ULTEO (running open office) does not help either.

Might be. There's so many different possible setups that it's quite unlikely that somebody with your setup is going to try this within 2 hours of you

or am I the only one that is too inexperienced to solve this issue (perhaps the latter).

not sure about inexperienced , but for example I didn't have this issue at all (although I'm also on Ubuntu, different environment I guess...

By the way, installing xhost does not work, setting DISPLAY enviroment to localhost does not help. Setting the DISPLAY environment to another server that runs ULTEO (running open office) does not help either.

No no and it should not be required. Somehow libreoffice tries to start a GUI although it should run headless (i.e. without GUI). So either there's some command line arguments missing / wrong which would trigger that (i.e. problem on ownCloud side), or your libreoffice is not built to properly to support that (i.e. problem on libreoffice/CentOS side).